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Browse our offers and join a passionate team that puts innovation to work for impact.

We are looking for

Java Developer (H/F/X)

About 5th floor

At 5th Floor, we help our clients transform complex environments into useful and accessible digital solutions. We place people at the heart of every project and are convinced that technology is only valuable if it meets real needs.
Our multidisciplinary teams work together to design, develop, and improve meaningful digital products.

Your role

Want to work as Full Stack Java Developer in an agile and passionate environment? 🚀

Your mission

  • You will be involved in projects in the public service that impact the daily life of citizens.
  • You will be part of the development team and contribute to delivering quality software: writing clean, functional and readable code and testing/bug fixing.

Your profile

  • You are a dynamic and proactive developer of IT solutions and processes, eager to manage and improve the user experience as part of a digital transformation plan.
  • During your professional experiences, you have evolved within service-oriented architectures by practicing the following methodologies and tools:
  • Microservices, REST, Continuous Delivery
  • Java 17, Spring Boot, JPA,
  • Gherkin, Cucumber, Cypress
  • Docker, Kubernetes, Openshift
  • Sql Server, ActiveMQ
  • Agile, Scrum, Devops
  • You are results-oriented, you collaborate and take initiatives on a daily basis.
  • As a team player, you put your skills at visual design and pragmatism.
  • You are familiar with Devops best practices. 
  • You have an excellent command of French and Dutch (mixed language projects).
  • You have a minimum of 3 – 5 years experience as a Full Stack Java Developer.
  • Experience in the Belgian public sector is an asset.
  • Knowledge of backend and frontend technologies is a must.

Ready to take up the challenge? Join us at the 5th!

  • 2 to 3 days of teleworking per week (included in the expenses)
  • Continuous learning and development opportunities
  • DKV hospital insurance
  • Alan complementary health insurance
  • Group insurance
  • Meal vouchers
  • Eco-vouchers
  • Company mobile phone and subscription
  • Mobility budget
  • Representation expenses
  • Collective agreement (CCT90) based on shared objectives

Publication date:

December 2025

Contract type:

Permanent contract – Full time

Location:

Brussels (hybrid)

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